corona AO map shows on curves

[VASLAVO]

Hi, i dont knwo is this is an existing issue or am i doing something wrong but i cant manage to ger the Ambient occlusion map to work onli on hard edges, is there a trick for this? Here is an example of what i meant

[maru]

I am not sure if you DO WANT the AO to show on hard edges, or not, but I would advise playing with the ray directionality parameter in AO settings.

[VASLAVO]

Ok, i dont waht the edges visible on the curve surface, is that fixed with the ray directionality because i have tried and tried an cant make then disappear, maybe im doing something wrong

[GeorgeK]

Hi Kogodis,

I will provide you with some test results on hard edges with Corona AO and different calculation methods, there might be something you can see that is close to what you want to achieve.

Ok, i dont waht the edges visible on the curve surface, is that fixed with the ray directionality because i have tried and tried an cant make then disappear, maybe im doing something wrong

For smoother edges without smoothed polygonal geometry you can always try Corona round edges on your bumb slot, default 3ds max smoothing groups at a certain extent can do the job too, also chamfer modifier. Usually after all the above the AO "breaks" it's edge strength, as previously mentioned ray directionality can affect AO contrast too.

[sprayer]

Corona_GK
I think he trying to say what AO sometimes draw on smooth edges, i have similar problems then i am trying to mix layerd material for hard edge it also drawing on smooth edge in a middle, it maybe not so visible comare to hard edges but still it have barely visible, for that reason we can't make for example clean lines pass like for cell shading simulation (i mean ctex pass with AO thin lines)
https://i.imgur.com/ZhKwgfs.jpg
https://i.imgur.com/Ynd8BC3.jpg

[GeorgeK]

Corona_GK
I think he trying to say what AO sometimes draw on smooth edges, i have similar problems then i am trying to mix layerd material for hard edge it also drawing on smooth edge in a middle, it maybe not so visible comare to hard edges but still it have barely visible, for that reason we can't make for example clean lines pass like for cell shading simulation (i mean ctex pass with AO thin lines)
https://i.imgur.com/ZhKwgfs.jpg
https://i.imgur.com/Ynd8BC3.jpg

Hi sprayer,

Have you experienced the same issue exporting AO as render element? Personally never had this, I would love to have a scene to test if that's possible.
Similar issues I had in the past, was mostly related to incorrect meshes, open edges, "rats nests", flipped normals, sparse vertices.

[sprayer]

Hi,
Yes my second example is render element ctex map with AO 1cm and color spread, i was need outlines for objects to make it more cartoonish look in photoshop, sadly round edge map works better for that.
It's the same for simple new scene with cylinder
https://i.imgur.com/wUvAIfv.png
https://i.imgur.com/AmXjbBB.png

[GeorgeK]

Hi,
Yes my second example is render element ctex map with AO 1cm and color spread, i was need outlines for objects to make it more cartoonish look in photoshop, sadly round edge map works better for that.
It's the same for simple new scene with cylinder
https://i.imgur.com/wUvAIfv.png
https://i.imgur.com/AmXjbBB.png

Ah yeah I see, yeah in this instance would be better to use falloff, or Corona RaySwitchMTL + Corona Front/Back, quite the work to achieve and works best with solo objects than scenes. Would like to see what you did with round edges, frankly it's an awesome tool.

[sprayer]

I am not sure what it's good solution for mixing layeredMTL
At least for drawing lines we can use round edge, i attached two pictures with AO and round edge, for AO i was have to use only outside to avoide this artifacts from AO on wireframe, as you can see round edge drawing more accurate lines.
On image with Mech was used layeredMtl with AO mask and you can see how it drawing lines on wireframe. O thing this bug came across from v3, in v2 there is no this artifacts if i am not mistaken, i remember how compare this Mech scene and do not notice this lines but saw how it start mixing different, more dirty on flat surface, i think because if this behavior